Which force helps swimmers float in water? Buoyancy Why is it better for a swimmer to be higher in the water? Wave resistance will be reduced proportionally by any amount of water that can go over the top of the swimmer. This is the reason why swimmers progress better underwater (at approximately a depth of […]
What is the physical and chemical properties of matter?
What is the physical and chemical properties of matter? A physical property is a characteristic of a substance that can be observed or measured without changing the identity of the substance. Physical properties include color, density, hardness, and melting and boiling points. A chemical property describes the ability of a substance to undergo a specific […]
Why is helium he placed in column 18 when it only has two valence electrons?
How do skaters not get dizzy?
How do skaters not get dizzy? When our head rotation triggers this automatic, repetitive eye movement, called nystagmus, we get dizzy. Skaters suppress the dizziness by learning how to counteract nystagmus with another type of eye movement, called optokinetic nystagmus. Why is backflip banned in skating? Even though the move that caused the leak was […]
Was Newton an average student?
Was Newton an average student? You see, when Newton first started his studies at The King’s School in Grantham, England, he was, for all intents and purposes a decidedly average student. Now it’s recorded that along with being a fairly average student, Newton was also a very lonely young boy who suffered at the hand […]
What is example of negative work?
What is example of negative work? Negative work follows when the force has a component opposite or against the displacement. Negative work removes or dissipates energy from the system. Two examples: In pulling a box of books along a rough floor at constant velocity, I do positive work on the box, that is I put […]
What does 8 mean in the periodic table?
What are two ways to increase potential energy?
What are two ways to increase potential energy? Gravitational potential energy increases as weight and height increases. Potential energy is energy that is stored in an object or substance. Gravitational potential energy is energy in an object that is held in a vertical position. How can we attract positive energy from the universe? 9 Ways […]
What is the medical term for the graphic record of the electrical impulses of the heart?
What is the medical term for the graphic record of the electrical impulses of the heart? ECG/EKG. The graphic record of the electrical current as it progresses through the heart. How is bipolar recording done? Bipolar electrodes are fabricated by hot-pressing the graphite felt sheets onto both sides of the conducting plastic substrates so that […]